I answered a question as "RichF" at the Retrocomputing StackExchange to, 'Why does the C128 perform poorly when running CP/M?'. I'd like it to be as correct as possible, so any feedback ya'll can provide will be welcome. Also, someone commented, hoping to see timing diagrams of the Z80A running on the C128's bus. Bil Herd has some old diagrams here relating to an early version of what became the CP/M cartridge for the C64, but I do not know how applicable those are.